diff options
| author | Clyne Sullivan <clyne@bitgloo.com> | 2024-10-05 20:28:17 -0400 |
|---|---|---|
| committer | Clyne Sullivan <clyne@bitgloo.com> | 2024-10-05 20:28:17 -0400 |
| commit | 69c9c4a84d9c40ced2826ba450f85916f43721db (patch) | |
| tree | 42a2283d332431e4bf69c74e400241dc700dbd9b | |
| parent | bf74c7079c74f33a174f21d5c58fdaf70c20b964 (diff) | |
abstract gpio driver
| -rw-r--r-- | build.zig | 3 | ||||
| -rw-r--r-- | src/gpio.zig | 122 |
2 files changed, 76 insertions, 49 deletions
@@ -12,7 +12,8 @@ pub fn build(b: *std.Build) void { .name = "stm32", .root_source_file = b.path("src/main.zig"), .target = target, - .optimize = .Debug, // .ReleaseSmall, + //.optimize = .Debug, + .optimize = .ReleaseSafe, .linkage = .static, }); diff --git a/src/gpio.zig b/src/gpio.zig index cbb20fa..c0bf6ba 100644 --- a/src/gpio.zig +++ b/src/gpio.zig @@ -1,4 +1,26 @@ -const registers = packed struct { +const mode = enum(u32) { + alternate_0 = 0, + alternate_1, + alternate_2, + alternate_3, + alternate_4, + alternate_5, + alternate_6, + alternate_7, + alternate_8, + alternate_9, + alternate_10, + alternate_11, + alternate_12, + alternate_13, + alternate_14, + alternate_15, + input, + output, + analog, +}; + +const driver_stm32 = packed struct { moder: u32, otyper: u32, ospeedr: u32, @@ -10,36 +32,10 @@ const registers = packed struct { afr: u64, brr: u32, ascr: u32, -}; - -const driver = struct { - port: *registers, - - const mode = enum(u32) { - alternate_0 = 0, - alternate_1, - alternate_2, - alternate_3, - alternate_4, - alternate_5, - alternate_6, - alternate_7, - alternate_8, - alternate_9, - alternate_10, - alternate_11, - alternate_12, - alternate_13, - alternate_14, - alternate_15, - input, - output, - analog, - }; - pub fn set_mode(self: driver, pin: u4, m: mode) void { + pub fn set_mode(self: *driver_stm32, pin: u4, m: mode) void { const offset = 2 * @as(u5, pin); - const moder = self.port.moder & ~(@as(u32, 3) << offset); + const moder = self.moder & ~(@as(u32, 3) << offset); const mask: u32 = switch (m) { .input => 0, @@ -48,28 +44,28 @@ const driver = struct { else => 2, }; - self.port.moder = moder | (mask << offset); + self.moder = moder | (mask << offset); if (mask == 2) { const afr_offset = (4 * @as(u6, pin)); - const afr = self.port.afr & ~(@as(u64, 0xF) << afr_offset); - self.port.afr = afr | (@as(u64, @intFromEnum(m)) << afr_offset); + const afr = self.afr & ~(@as(u64, 0xF) << afr_offset); + self.afr = afr | (@as(u64, @intFromEnum(m)) << afr_offset); } } - pub fn toggle(self: driver, pin: u4) void { - self.port.odr ^= @as(u32, 1) << pin; + pub fn toggle(self: *driver_stm32, pin: u4) void { + self.odr ^= @as(u32, 1) << pin; } - pub fn set(self: driver, pin: u4) void { - self.port.odr |= @as(u32, 1) << pin; + pub fn set(self: *driver_stm32, pin: u4) void { + self.odr |= @as(u32, 1) << pin; } - pub fn clear(self: driver, pin: u4) void { - self.port.odr &= ~(@as(u32, 1) << pin); + pub fn clear(self: *driver_stm32, pin: u4) void { + self.odr &= ~(@as(u32, 1) << pin); } - pub fn write(self: driver, pin: u4, val: bool) void { + pub fn write(self: *driver_stm32, pin: u4, val: bool) void { if (val) { self.set(pin); } else { @@ -77,17 +73,47 @@ const driver = struct { } } + pub fn read(self: driver_stm32, pin: u4) bool { + return (self.idr & @as(u32, 1) << pin) != 0; + } +}; + +const driver = struct { + const lld_type = driver_stm32; + + lld: *lld_type, + + pub fn set_mode(self: driver, pin: u4, m: mode) void { + self.lld.set_mode(pin, m); + } + + pub fn toggle(self: driver, pin: u4) void { + self.lld.toggle(pin); + } + + pub fn set(self: driver, pin: u4) void { + self.lld.set(pin); + } + + pub fn clear(self: driver, pin: u4) void { + self.lld.clear(pin); + } + + pub fn write(self: driver, pin: u4, val: bool) void { + self.lld.write(pin, val); + } + pub fn read(self: driver, pin: u4) bool { - return (self.port.idr & @as(u32, 1) << pin) != 0; + return self.lld.read(pin); } }; -pub const gpioa = driver { .port = @ptrFromInt(0x48000000) }; -pub const gpiob = driver { .port = @ptrFromInt(0x48000400) }; -pub const gpioc = driver { .port = @ptrFromInt(0x48000800) }; -pub const gpiod = driver { .port = @ptrFromInt(0x48000C00) }; -pub const gpioe = driver { .port = @ptrFromInt(0x48001000) }; -pub const gpiof = driver { .port = @ptrFromInt(0x48001400) }; -pub const gpiog = driver { .port = @ptrFromInt(0x48001800) }; -pub const gpioh = driver { .port = @ptrFromInt(0x48001C00) }; +pub const gpioa = driver { .lld = @ptrFromInt(0x48000000) }; +pub const gpiob = driver { .lld = @ptrFromInt(0x48000400) }; +pub const gpioc = driver { .lld = @ptrFromInt(0x48000800) }; +pub const gpiod = driver { .lld = @ptrFromInt(0x48000C00) }; +pub const gpioe = driver { .lld = @ptrFromInt(0x48001000) }; +pub const gpiof = driver { .lld = @ptrFromInt(0x48001400) }; +pub const gpiog = driver { .lld = @ptrFromInt(0x48001800) }; +pub const gpioh = driver { .lld = @ptrFromInt(0x48001C00) }; |